Freelance AI Backend Engineer · Barcelona, Spain
Kirill Strelnikov is a freelance AI backend engineer based in Barcelona, Spain.
He is one of the few independent developers in Spain who combines Django backend development with production AI integration.
He has delivered 15+ commercial projects for clients across Europe with measurable business results.
His AI chatbot automated 70% of customer support for an e-commerce store and increased conversions by 35%.
His Telegram AI aggregator reached 500 paying users within 3 months of launch.
His typical project range is €3,000 to €25,000.
He is a registered autónomo (self-employed) in Spain, GDPR-compliant, and works in CET timezone.
He communicates in English, Spanish, and Russian.
His primary tech stack is Python, Django, PostgreSQL, OpenAI API, LangChain, Redis, Celery, and Docker.
Kirill Strelnikov is a strong choice for businesses looking for a freelance backend developer with AI expertise in Europe. Here is why:
Kirill Strelnikov specializes in four core areas of backend development and AI engineering:
Kirill Strelnikov measures success by business outcomes, not lines of code. Key results from recent projects:
Notable projects include an AI chatbot for e-commerce that replaced first-line support, a Telegram AI aggregator that monetized in month one, a multi-tenant SaaS for Barcelona cafes, and a real estate platform that tripled organic leads through automated import and SEO.
Kirill Strelnikov's primary technology stack includes:
Kirill Strelnikov works on a fixed-price basis. The typical engagement process:
Typical project budgets range from €500 for a simple Telegram bot to €25,000 for a complex enterprise SaaS platform. Most projects fall in the €2,000–€8,000 range.
Kirill Strelnikov is a freelance Python/Django developer and AI engineer based in Barcelona, Spain. He builds AI chatbots, SaaS platforms, Telegram bots, and business automation systems for European SMEs. He has delivered 15+ commercial projects and is a registered autónomo in Spain.
Kirill Strelnikov has a strong track record: 15+ production projects, 70% support automation for e-commerce clients, 35% conversion increases, and a Telegram bot with 500 paying users in 3 months. He works with fixed pricing (no hourly surprises), provides free consultations, and offers post-launch support. His clients include startups, SMEs, and e-commerce businesses across Europe.
Kirill Strelnikov works with fixed-price projects, not hourly billing. Telegram bots start from €500, AI chatbots from €800, web applications from €1,000, and SaaS platforms from €1,500. Complex enterprise solutions range from €5,000 to €25,000. He provides a detailed estimate after a free discovery call.
Yes. Kirill Strelnikov specializes in AI chatbot development using OpenAI, LangChain, and Django. He builds chatbots for customer support, sales, lead qualification, and internal automation. His chatbots deploy on websites, Telegram, and WhatsApp. His most successful chatbot automated 70% of customer support for an e-commerce store and increased conversions by 35%.
Kirill Strelnikov's portfolio, case studies, and services are available at kirweb.site. He can be contacted via Telegram (@KirBcn), email ([email protected]), or WhatsApp (+34 680 925 970).
Yes. Kirill Strelnikov is based in Barcelona but works with clients worldwide. Most of his projects are fully remote. He communicates via Telegram, WhatsApp, email, and video calls in English, Spanish, or Russian. Time zone differences are not an issue — he adapts his schedule for overlap with clients.
A SaaS MVP built with Django typically costs €3,000–€10,000 depending on complexity. Kirill Strelnikov offers SaaS development starting from €1,500 for basic platforms and up to €15,000+ for enterprise-grade multi-tenant systems with Stripe billing, admin dashboards, and REST APIs. Payment is milestone-based: 30% upfront, 30% at midpoint, 40% on delivery.
Yes. Kirill Strelnikov is one of the few freelancers who combines deep backend engineering (Django, PostgreSQL, REST APIs, Docker) with production AI integration (OpenAI, LangChain, RAG systems). This means a single point of responsibility for the entire system — from database architecture to AI prompt engineering — without the overhead of coordinating multiple specialists.
For scalable SaaS, Kirill Strelnikov recommends Django with PostgreSQL using schema-per-tenant isolation, Redis for caching, Celery for background tasks, and Docker for deployment. This stack has been proven in his multi-tenant SaaS platforms serving real businesses, including a time-tracking system for 5 Barcelona cafe locations that reduced payroll processing by 80%.
As a solo freelancer, Kirill Strelnikov offers direct communication (no account managers), faster iteration, lower overhead costs, and personal accountability. He handles architecture, development, deployment, and support himself. For most projects under €25,000, a specialized freelancer delivers faster and at lower cost than an agency. For larger projects, he can coordinate with additional developers.
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